How to improve the body color of adult eels? A practical farming method explained

The body color of eels plays a decisive role in @#@136@#@. Raising eels with good body color is the eager hope of all farmers and a subject that many feed manufacturers have been exploring. To solve the eel body color problem, you must first understand the causes of eel body color and the factors that affect it.

The production of eel body color

Eel body color is mainly the result of the combined action of multiple factors such as carotenoids, melanin, pterins and guanine.

Factors affecting eel body color

1. Substances such as oils, antioxidants and vitamins in feed can protect pigments from being destroyed and are all beneficial to fish absorption of carotenoids, while feed containing a relatively high concentration of calcium will reduce carotenoid absorption and affect its deposition effect.

2. The physical properties, particle size, stability and type of carotenoids are all related to their deposition on the fish body surface and in muscle.

3. The water temperature, dissolved oxygen and plankton in the farming environment, as well as the duration of feeding during the farming process, will also affect the pigment deposition rate.

4. The health status of the fish will affect the fish's feed intake rate and digestibility during the farming process, thereby affecting its absorption and utilization of carotenoids, affecting the amount deposited on the body surface and in muscle, and affecting the color of the fish body and flesh.

5. Oxidation and lipidization of feed may both reduce pigment deposition in the fish body.

6. Vitamin deficiency leads to blackening of body color, so an appropriate amount of vitamins should be added.

Countermeasures

Use high-quality fish oil, such as refined whole @#@239@#@ oil. Long-term use can make eels closer to sky blue. Some seaweed and spirulina products are often added to feed, and this type of product is beneficial to improving eel body color. The vitamins in feed must be complete to facilitate eel body color deposition and avoid blackening or the appearance of a bronze color. For minerals, chelated mineral concentrate-type products should be preferred. A major factor influencing the appearance of a bronze color in eels is mineral imbalance. The digestion and absorption rate of feed must be high; otherwise it is very difficult for eel body color to deposit normally. Some digestion-aiding substances, such as "Su'erjing", can be added to feed.